Improvement in machine for cutting locks in hoofs



mined tant ate-nt @tithe Letters 'Patent No. 101,436, dated April 5, 1870.

IMPROVEMENT IN MACHINE FOR CUTTING LOCKS IN HOOPS.

The Schedule referred to in these Letters Patent and making paxt of the same To all whom it may concern Be it known that I, THEoDoRE GONKLIN, of Fond du Lac, in the county of Fond du Lac and State of W'isconsin, have invented a new and improved Hooplock Cutter; and I do hereby declare that the .fol-

lowing is a full, clear, and exact description thereof,-

which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings forming part of this specification. This invention relates to improvements in machines for cutting the locks of hoops of wood for barrels.

The invent-ion consists of an adjustable clamp for holding-the hoop, guide-springs for regulating the positioubefore the hoop is clamped, an inclined sliding crotched knife for cutting the straight part ofthe lock,

a. swinging knife for cutting the curved angnlarwall ot the notch, and an adjusting-spring for governing the chamfer at the side of t-he straight wall of the lock, all under-such an arrangement that the knife for out-- ting the straight shoulder of the lock and the chaifer thereat will be worked to accomplish vits cutting and be withdrawn previous to the finishing of the operation of the other knife, by one land the same movement of a hand-lever, all as hereinafter more fully specified.

Figure 1 represents a plan view of my improved machine;

Figure 2 represents a section on the line x x of iig. 1, liooking in the direction indicated by the arrow; an

Figure 3 is an opposite view at the same section.

Similar letters 'of reference indicate corresponding parts.

A is anadjustable plate, supported above thev bed B on the adjusting-bolts C, and forms the lower jaw of a clamp,of which the plate 1) is the upper jaw, connected bythe bolts E, passing through the jaw A :and bed B to a yoke, F, below, which is intended to have afoot-treadle or level' connected to it in any way, so that the jaw D may be brought down suddenly by the foot. Y ,Y

Spiral springs G are arranged around the bolts, to raise the jaw D up again.

The hoop which is represented in dotted -lines at H is' to be clamped between these jaws, to beheld for cutting the locks or notches by which they are locked together, and it is intended that the clamping-jaws will act only-on the rear edge, or that opposite the one in which the notch is to be cut, so that lthe frontof .the edge of the hoop may be raisedto the required inclination relatively to the inclined knife H, which is preferably arranged upon such an inclination to the clamp that its supporting-stock I may slide under the clamp in guides K provided for it.

This cutter is provided with t-wo cutting-blades L M, the one nearly perpendicular tothe other; the one, M, being arranged to cut the straight wall of the notch in the transverse direction of the hoop, and the lother to chamfer the bottom of I the hoop adjacent to the said wall of the notch.

The stock I, to which the said knife is connected by its shank passing through a stud, 0, provided with a holding-screw, screwing down upon the saidshank, is provided with a broad lateral'slot-ted extension, Q.

At theouter end, a pin, R, of the hand-lever S, pivoted at T, works in this slot, to impart reciprocating movement to the slide I.

The swinging end of this level' S is armed with the angular cutter U, which, by swinging around on the pivot 'l against the edge of the hoop, cuts the curved and angular wall of the notch for the lock, as represented in dotted lines at V.

The clamp D is notched at the edge fronting the cutting-knives, to provide room for them to work freely.

The level' S is moved by hand, and for that purpose a lever, S', is 'attached to it, and the movement ot' this lever accomplishes the movement of' the slide I and knife H.

The slot in the stock l for the pin lt is so shaped that the knife Hwill be moved down against the hoop, accomplish its work, and be withdrawn again before the other knife arrives at therend of its stroke, whereby' one will not interferewit-h the other. l

It is also necessary to cut the shoulder first, to prevent the knife U from splitting the hoop.

W represents a spring fastened to the stock K,and arranged so that when the hoop is placed in the clamps, its lower Vfront edge will rest on it, and be pressed up against the upper clamp, to maintain it in the proper position for tho knives to act required, relatively to both edges; that is, the knives will remove the right amounts from each face of the hoop, and shape 4the notches properly.

X` represents spring guards arranged in pairs on cach side of the bed, to receive the hoops and hold them inthe right pla :e temporarily, until the clamp comes down. They are attached to the bed, and rise up in pairs close enough together to receive' the narrow hoop, and' will spring apart to receive the wide ones.

Having thus'described my invention, l claim as new and desire to secure by Letters Patent- 1. The combination of the bed B, adjustable clamping-jaw A, movable jaw D, rods E, springs Gv, and yoke F, substantially as specied.

2. The combination of the clamping-jaws, movable knife H, and swinging knife U, substantiallyvas specified.

3. 'lhe combination with the clamping-jaws of the spring W, substantially as specified. f'

lHEODOR-E CONKLIN Witnesses z,

Jos. Mclin BIN, 0. IIAELES. 

